Good discussion on whether to rebalance your mutual fund percentages or not. Here are some thoughts based on my 35 years of investing experience.
Rebalancing is not guaranteed to produce better gains, but it does generally reduce your portfolio volatility, making for a smoother ride. Consequently, I generally recommend rebalancing at least every two or three years. If you want to do this annually, that is fine as well. Below is a true story that illustrates this point.
A former co-worker of mine never re-balanced his 401K portfolio. After 30 years of investing, one of his funds (T-Rowe Price New Horizons) went from being 25 percent of his portfolio to approximately 50 percent. When he gleefully informed me in 2020 how well his New Horizon fund had done, I said that was awesome, but suggested that he rebalance his portfolio, bringing his New Horizon allocation closer to his original percentage. He disagreed, saying that his approach has been working great.
In 2022, New Horizons dropped 37 percent and his fund balance fell by approximately $500,000. Now, his asset allocations are more aligned with his original percentages. At the end of the day, he still probably made more money by letting his New Horizon balance ”ride” and not rebalancing. This is because New Horizons has had a tremendous run over the past 30 years.
Moral of the story: If you do not rebalance, the market will eventually do it for you.